Bisphenol A,a hazardous endocrine disruptor,poses significant environmental and human health threats,demanding efficient removal approaches.Traditional biological methods struggle to treat BPA wastewater with high chl...Bisphenol A,a hazardous endocrine disruptor,poses significant environmental and human health threats,demanding efficient removal approaches.Traditional biological methods struggle to treat BPA wastewater with high chloride(Cl^(-))levels due to the toxicity of high Cl^(-)to microorganisms.While persulfate-based advanced oxidation processes(PS-AOPs)have shown promise in removing BPA from high Cl^(-)wastewater,their widespread application is always limited by the high energy and chemical usage costs.Here we show that peroxymonosulfate(PMS)degrades BPA in situ under high Cl^(-)concentrations.BPA was completely removed in 30 min with 0.3 mM PMS and 60 mM Cl^(-).Non-radical reactive species,notably free chlorine species,including dissolved Cl2(l),HClO,and ClO−dominate the removal of BPA at temperatures ranging from 15 to 60°C.Besides,free radicals,including•OH and Cl_(2)^(•−),contribute minimally to BPA removal at 60°C.Based on the elementary kinetic models,the production rate constant of Cl2(l)(32.5 M^(−1) s^(−1))is much higher than HClO(6.5×10^(−4) M^(−1) s^(−1)),and its degradation rate with BPA(2×10^(7) M^(−1) s^(−1))is also much faster than HClO(18 M^(−1) s^(−1)).Furthermore,the degradation of BPA by Cl2(l)and HClO were enlarged by 10-and 18-fold at 60°C compared to room temperature,suggesting waste heat utilization can enhance treatment performance.Overall,this research provides valuable insights into the effectiveness of direct PMS introduction for removing organic micropollutants from high Cl^(-)wastewater.It further underscores the critical kinetics and mechanisms within the PMS/Cl⁻system,presenting a cost-effective and environmentally sustainable alternative for wastewater treatment.展开更多
Biochars are low-cost and sustainable materials for environmental technologies.In this work,we pre-pared three biochars using pomelo peel(P-BC),algae(A-BC),and corncob(C-BC)to recover Cd^(2+)from wastewater via capaci...Biochars are low-cost and sustainable materials for environmental technologies.In this work,we pre-pared three biochars using pomelo peel(P-BC),algae(A-BC),and corncob(C-BC)to recover Cd^(2+)from wastewater via capacitive deionisation(CDI).A-BC possesses the highest amount of mesopores and nitro-gen functionality and attains the highest removal of Cd^(2+)via physical adsorption.For the electro-sorption capacity,C-BC and A-BC perform better capacitive removal of Cd^(2+)than P-BC due to the smaller charge-transfer and mass-transfer resistances.Also,this work investigated the impacts of surface morphology,cell voltage,NaCl,initial pH,and Cd^(2+)concentrations on Cd^(2+)capacitive removal and electrode regen-eration performances.The results indicated that A-BC and C-BC may be prospective materials for Cd^(2+)removal from wastewater by CDI.However,the presence of competing cations at high concentrations may influence the removal of Cd^(2+)at a low level,requiring the modification of A-BC and C-BC in future work.展开更多
This study aims to analyze the differential cross sections （DCSs） of elastic scattering and total reaction cross sections （TRCSs） of the loosely-bound deuteron projectile impinging on lp-shell nuclei, such as 9Be,...This study aims to analyze the differential cross sections （DCSs） of elastic scattering and total reaction cross sections （TRCSs） of the loosely-bound deuteron projectile impinging on lp-shell nuclei, such as 9Be, 12C, and 160, at incident energies ranging between 10.6 and 171 MeV using the continuum discretized coupled channel （CDCC） method. By fitting the experimental data for the DCSs and TRCSs, energy-dependent renormalization factors for the real and imaginary parts of the nucleon-nucleus optical-model potentials deduced from the studies proposed by Koning and Delaroche （KD02） and by Watson, Singh, and Segel （WSS）, are obtained. It is found that with the WSS potential, which was obtained specifically for lp-shell nuclei, the CDCC calculations can simultaneously reproduce both the DCSs and the TRCSs. The results show that it is important to choose appropriate optical potentials to describe deuteron-induced reactions.展开更多
基金Key-Area Research and Development Program of Guangdong Province(No.2023B0101200004)Shenzhen Science and Technology Innovation Program(No.RCBS20210706092219047,GXWD20231129122140001,KQTD20190929172630447,2022A1515110698,and RCBS 20221008093229033)+1 种基金National Natural Science Foundation of China(No.52000053)Open Project of State Key Laboratory of Urban Water Resources and Environment(QA202440).
文摘Bisphenol A,a hazardous endocrine disruptor,poses significant environmental and human health threats,demanding efficient removal approaches.Traditional biological methods struggle to treat BPA wastewater with high chloride(Cl^(-))levels due to the toxicity of high Cl^(-)to microorganisms.While persulfate-based advanced oxidation processes(PS-AOPs)have shown promise in removing BPA from high Cl^(-)wastewater,their widespread application is always limited by the high energy and chemical usage costs.Here we show that peroxymonosulfate(PMS)degrades BPA in situ under high Cl^(-)concentrations.BPA was completely removed in 30 min with 0.3 mM PMS and 60 mM Cl^(-).Non-radical reactive species,notably free chlorine species,including dissolved Cl2(l),HClO,and ClO−dominate the removal of BPA at temperatures ranging from 15 to 60°C.Besides,free radicals,including•OH and Cl_(2)^(•−),contribute minimally to BPA removal at 60°C.Based on the elementary kinetic models,the production rate constant of Cl2(l)(32.5 M^(−1) s^(−1))is much higher than HClO(6.5×10^(−4) M^(−1) s^(−1)),and its degradation rate with BPA(2×10^(7) M^(−1) s^(−1))is also much faster than HClO(18 M^(−1) s^(−1)).Furthermore,the degradation of BPA by Cl2(l)and HClO were enlarged by 10-and 18-fold at 60°C compared to room temperature,suggesting waste heat utilization can enhance treatment performance.Overall,this research provides valuable insights into the effectiveness of direct PMS introduction for removing organic micropollutants from high Cl^(-)wastewater.It further underscores the critical kinetics and mechanisms within the PMS/Cl⁻system,presenting a cost-effective and environmentally sustainable alternative for wastewater treatment.
基金financially supported by the fellow-ship of the China Postdoctoral Science Foundation(No.2022TQ0088)the National Natural Science Foundation of China(No.52000053)+1 种基金Shenzhen Science and Technology Program(No.GXWD20201230155427003-20200821174135002,RCBS20210706092219047,and KQTD20190929172630447)the Open Project of State Key Laboratory of Urban Water Resources and Environment(No.2021TS28).
文摘Biochars are low-cost and sustainable materials for environmental technologies.In this work,we pre-pared three biochars using pomelo peel(P-BC),algae(A-BC),and corncob(C-BC)to recover Cd^(2+)from wastewater via capacitive deionisation(CDI).A-BC possesses the highest amount of mesopores and nitro-gen functionality and attains the highest removal of Cd^(2+)via physical adsorption.For the electro-sorption capacity,C-BC and A-BC perform better capacitive removal of Cd^(2+)than P-BC due to the smaller charge-transfer and mass-transfer resistances.Also,this work investigated the impacts of surface morphology,cell voltage,NaCl,initial pH,and Cd^(2+)concentrations on Cd^(2+)capacitive removal and electrode regen-eration performances.The results indicated that A-BC and C-BC may be prospective materials for Cd^(2+)removal from wastewater by CDI.However,the presence of competing cations at high concentrations may influence the removal of Cd^(2+)at a low level,requiring the modification of A-BC and C-BC in future work.
基金the National Natural Science Foundation of China(52125002)the Research Program of Chongqing Municipal Education Commission(KJZD-K202101502)the Natural Science Foundation of Jiangxi Province(20224ACB203015)。
基金supported by the National Key R&D Program of China(Grant No.2018YFA0404403)the National Natural Science Foundation of China(Grant Nos.11775004,and 11775036)
文摘This study aims to analyze the differential cross sections （DCSs） of elastic scattering and total reaction cross sections （TRCSs） of the loosely-bound deuteron projectile impinging on lp-shell nuclei, such as 9Be, 12C, and 160, at incident energies ranging between 10.6 and 171 MeV using the continuum discretized coupled channel （CDCC） method. By fitting the experimental data for the DCSs and TRCSs, energy-dependent renormalization factors for the real and imaginary parts of the nucleon-nucleus optical-model potentials deduced from the studies proposed by Koning and Delaroche （KD02） and by Watson, Singh, and Segel （WSS）, are obtained. It is found that with the WSS potential, which was obtained specifically for lp-shell nuclei, the CDCC calculations can simultaneously reproduce both the DCSs and the TRCSs. The results show that it is important to choose appropriate optical potentials to describe deuteron-induced reactions.
